Jesse Taylor at Pandagon nails a few points I missed:
1. The inseparability of action, cause & motivation belies Krauthammer & friends’ claims of multivalent meanings associated with the doctrine.
2. The source of the ever-shifting definitions of the Bush doctrine is the improvisational (not to mention utterly unsuccessful) nature of Bush foreign policy. Basically, they had to continually change direction as one plate of spaghetti after another was thrown at the wall, only to sink in a heap on the baseboards.